APA (7th ed.) Citation

Heffer, D. E., King, G. A., & Keith, D. (1981). Basic principles and practice of microprocessors. Arnold.

Chicago Style (17th ed.) Citation

Heffer, D. E., G. A. King, and D. Keith. Basic Principles and Practice of Microprocessors. London: Arnold, 1981.

MLA (9th ed.) Citation

Heffer, D. E., et al. Basic Principles and Practice of Microprocessors. Arnold, 1981.